Appel, H., Crusius, J., & Gerlach, A. (2015). Social comparison, envy, and depression on Facebook: A study looking at the effects of high comparison standards on depressed individuals. Journal of Social and Clinical Psychology, 34, 277-289. https://doi.org/10.1521/jscp.2015.34.4.277[pdf]

Hanko, K., Crusius, J., & Mussweiler, T. (2010). When I and me are different: Assimilation and contrast in temporal self-comparisons. European Journal of Social Psychology, 40, 160–168. https://doi.org/10.1002/ejsp.625[pdf]